Solution
A peer-to-peer (P2P) network is a system where computers, called nodes, communicate and share resources directly with each other without relying on a central server. Each node can act as both a client and a server, making the network more robust and decentralized.
In blockchain, nodes maintain copies of the ledger, validate transactions, and agree through consensus. There is no single computer in charge. This is essential because decentralization reduces a single point of failure, supports transparency, and matches the idea of a shared digital notebook that everyone holds.